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WO1991011374A2 - Materiau d'empaquetage sterilisable a la vapeur et emballages fabriques avec ledit materiau - Google Patents

Materiau d'empaquetage sterilisable a la vapeur et emballages fabriques avec ledit materiau Download PDF

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Publication number
WO1991011374A2
WO1991011374A2 PCT/US1990/007241 US9007241W WO9111374A2 WO 1991011374 A2 WO1991011374 A2 WO 1991011374A2 US 9007241 W US9007241 W US 9007241W WO 9111374 A2 WO9111374 A2 WO 9111374A2
Authority
WO
WIPO (PCT)
Prior art keywords
package
packaging material
tray
lid
steam
Prior art date
Application number
PCT/US1990/007241
Other languages
English (en)
Other versions
WO1991011374A3 (fr
Inventor
Charles Phillip Gogdill
Original Assignee
W.L. Gore & Associates, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by W.L. Gore & Associates, Inc. filed Critical W.L. Gore & Associates, Inc.
Publication of WO1991011374A2 publication Critical patent/WO1991011374A2/fr
Publication of WO1991011374A3 publication Critical patent/WO1991011374A3/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/26—Accessories or devices or components used for biocidal treatment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
    • A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/04—Heat
    • A61L2/06—Hot gas
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
    • A61B2050/005—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers with a lid or cover
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
    • A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
    • A61B50/33—Trays

Definitions

  • This invention relates to a non-rigid, steam permeable, bacteria impermeable packaging material and packages and packaqe components made thereof for use in, for example, packaging medical devices.
  • Non-rigid, steam permeable packaging materials presently used are only marqinally capable of withstanding steam sterilization at 121°C (250°F) and no presently available non-rigid steam permeable packages are capable of withstanding steam sterilization at 132°C (270°F) for 15 minutes without suffering significant temperature and steam induced damage, i.e., wrinkling or shrinkage that would compromise the appearance or integrity of the package or the sterility of the package contents. This capability is herein termed "steam resistant”.
  • non-rigid is herein meant to describe materials that may be easily flexed or bent by hand.
  • the degree of rigidity provided by packages comprised of these non-rigid materials is generally adequate to provide the necessary degree of mechanical protection for the package contents.
  • Steam sterilization is effective in that the water vapor serves as the heat transport mechanism. Steam heats material surfaces and permeates porous substances by the relatively rapid process of condensation. The use of dry hot air or any other gas to heat surfaces is much slower and consequently less effective.
  • a steam permeable material In order for steam to be able to permeate a package to sterilize the contained medical device, it is necessary for at least a portion of the package to be comprised of a steam permeable material. This material must also be bacteria impermeable in order to maintain the sterility of the package contents.
  • Tyvek ® A commonly used non-rigid, steam permeable, bacteria impermeable packaging material is Tyvek ® , available from E. I. DuPont de Nemours Co., Inc.
  • Tyvek is a spunbonded olefin sheet product of hiqh density polyethylene fibers that is used as a lid for medical device packages in which. t is bonded to a steam impermeable tray.
  • DuPont product literature states that Tyvek begins to shrink at 118°C (245°F) and melts at 135°C (275°F). It is marginally tolerant of steam steril za ⁇ tion at 121°C (250°F) but cannot withstand 135°C (270°F) for 15 minutes.
  • the trays that are typically used for the lower portion of medical device packages are generally plastics such as polyvinyl chloride. These plastic packaging materials are likewise not capable of withstanding steam sterilization at 132°C (270°F) for 15 minutes.
  • Disposable packages i.e., packages meant to be disposed of after use, presently constitute a substantial part of medical wastes.
  • a preferred disposable package material would be one which is easily recyclable, e.g., a material comprised primarily of aluminum.
  • a non-rigid, steam permeable, bacteria impermeable packaging material capable of withstanding steam sterilization at 132°C (270°F) for 15 minutes is described.
  • the packaging material comprises: a. a sheet of non-rigid, steam resistant, bacteria impermeable material having at least one opening through the sheet; b. A steam permeable, bacteria impermeable membrane covering said opening and bonded to the perimeter of said sheet adjacent to the opening.
  • Preferred non-rigid, steam resistant sheet materials are metal foils such as aluminum and heat tolerant plastics such as polyphthalate carbonate, polypropylene and certain heat tolerant polycarbonates.
  • the metal foils may be coated with plastics such as, for example, polypropylene or polycarbonate.
  • the steam permeable and bacteria impermeable membrane is preferably porous polytetrafluoro- ethylene having a mean fibril length between 0.35 microns and 50 microns.
  • Complete packages of this packaging material are described, as are separate package components, i.e. lids and trays.
  • a oouch type of package is also described, wherein a single sheet of the inventive packaging material is folded in half to enable the opposing inner surfaces adjacent to the edges to be bonded together to form the pouch. Additionally, package lids and complete packages comprised of the membrane material are described.
  • Figure 1 is a perspective view of a package lid and tray of the packaging material of the present invention.
  • Figure 2 is a section view of a medical device package made ' of the packaging material of the present invention, said packaqe having an inner lid and tray within an outer lid and tray.
  • Figure 3 is a view of a sheet of the packaging material of the present invention to be made into a pouch-type package.
  • Figure 4 is a perspective view of a completed foil pouch package made of the packaging material of the present invention.
  • the present invention comprises a non-rigid, steam permeable, bacteria impermeable packaging material for use in packaging, for example, medical devices.
  • This packaging material, as well as package components and complete packages made from this material are capable of withstanding steam sterilization at temperatures in excess of 132°C (270°F) for extended periods without adverse effects and may therefore be subjected to repeated steam sterilization cycles at 132°C (270°F) for 15 minutes without damage that would jeopardize the integrity of the package or the sterility of the contents.
  • the packaging material of the present invention incorporates a steam permeable bacterial barrier that allows the rapid transport of steam to the package contents. This packaging material can also be useful for other sterilization techniques such as ethylene oxide, radiation and ozone.
  • Plastic-coated metal foils represent the preferred steam resistant sheet materials of this invention because they are inexpensive and are easily recyclable after disposal. Plastic-coated aluminum foils are most preferred for the same reasons. The outer surfaces of the metal foil may be plated, anodized, printed, or have a label suitably attached so long as it does not cover the steam permeable membrane. Plastic-coated metal foils are presently available from several manufacturers and are well known in the art of packaging.
  • Suitable plastic coatings include polypropylene and polycarbonate. Any plastic is suitable so long as the integrity of its bond to the metal foil is not jeopardized by steam sterilization cycles of 15 minutes at 132°C (270°F) and the plastic does not contaminate the device or material contained by the package.
  • the steam resistant sheet materials may be any plastic that has a melting point significantly in excess of 132°C (270°F) so that wrinkling, shrinkage or contamination do not occur during exposure to steam sterilization cycles of 132°C (270°F) for fifteen minutes.
  • Polypropylene and certain heat tolerant polycarbonates are preferred plastics for use as these sheet materials.
  • Polyphthalate carbonate has excellent heat capability and is especially preferred as a steam resistant plastic for use in packaging materials and packages of the present invention. Some of these plastics, e.g., polyphthalate carbonate, are available as transparent materials that can be used to allow viewing of the package contents.
  • the preferred material for use as the steam permeable, gas permeable and bacteria impermeable membrane is porous, expanded polytetrafluoroethylene (hereinafter PTFE).
  • PTFE porous, expanded polytetrafluoroethylene
  • This material has a icrostructure of nodes interconnected by fibrils.
  • the process for its manufacture is taught in U.S.P. 3,953,566; 3,962,153 and 4,187,390.
  • PTFE has a useful temperature range of up to 260°C (500°F). It is extremely inert and non-shedding.
  • Porous expanded PTFE can be made in a range of pore sizes.
  • Preferred pore sizes for service as the porous membrane of the present invention are 0.35 microns to 50 microns with 0.45 microns to 30 microns most preferred.
  • This range of pore sizes is steam permeable and bacteria impermeable in suitable thicknesses. Larger pore sizes can be used with thicker membranes, the thicker membrane presenting a more tortuous path to the passage of bacteria, enabling the large pore size to function effectively as a bacterial barrier. Pore sizes below 0.35 microns are useable only for long sterilization cycles during which rates of pressure change can be kept low enough to prevent damage to the membrane-to-package bond resulting from high pressure differentials. Membranes with pore sizes above .35 microns will thus not generally require a mechanical retainer to secure the membrane to the package. These membrane materials may be thermally bonded to the plastic or plastic-coated inner surface perimeter of a lid or tray openinq.
  • Porous PTFE having a backing material of a polymeric fabric, fibers or porous film such as polypropylene or polyester bonded to one or both surfaces is available from W. L. Gore and Associates, Inc., Elkton, Maryland in a variety of pore sizes.
  • the chosen backing material must be capable of withstanding the anticipated sterilization process without suffering thermal damage. Because the backing material has a lower melting point than the PTFE, the backing material surface may be more easily bonded to the inner surface of a package pouch, lid or tray.
  • Porous PTFE with a backing material bonded to at least one surface is therefore most preferred for use as the steam permeable, bacteria impermeable membrane of the present invention.
  • Pore size for these materials is determined by ASTM F316-86, Method A (Maximum Pore Size) using denatured alcohol as the test fluid.
  • a preferred package made from the packaging material of the present invention comprises a rrfetal foil tray component and lid component, both package components having a coating of a steam resistant plastic film, e.g., polypropylene, on their inner surfaces.
  • the most typical configuration uses a flat lid and a tray wherein the tray is essentially in the form of a lid!ess box having a flange around the top edges of the box.
  • the lid and tray each incorporate at least one opening cut through their respective surfaces.
  • a steam permeable, bacteria impermeable membrane is used to cover each opening, the membrane being larger in size than the opening area and bonded to the plastic coating on the inner surface adjacent to the perimeter of the opening.
  • One larqe opening or multiple small openings in each component may be used, the only requirement being that the openinq area combined with the permeability characteristics of the membrane covering the opening result in adequate sterilization.
  • the techniques used to test for steam permeability and bacteria impermeability are described in Example 3. Briefly, steam permeability is verified by sealing a bacteria test strip (Bacillus sterothermophilus) within a sealed packaqe made from the packaging material of this invention. The sealed package is subjected to a steam sterilization cycle of 270°F for 15 minutes.
  • the package is then opened aseptically, the bacteria test strip removed and placed into a test tube containing 10 ml of tryptocase soy broth, incubated for seven days at 30-35°C and checked for growth. Bacteria impermeability is tested in a similar manner.
  • a quantity of bacteria growth medium (60 ml of tryptocase soy agar) is aseptically injected into a sterile package made from the packaging material of this invention.
  • the sealed sterile package is placed into a sealed pressure chamber, exposed to an aerosol spray containing Pseudomonas diminuta, and finally subjected to a pressure and vacuum cycle.
  • Package sealing is accomplished as follows: after the device or material to be packaged has been placed into the tray, the lid is placed onto the tray and heat sealed to the tray under both heat and pressure for a suitable period of time. The seal is accomplished by melting and thermally bonding the steam resistant plastic film coating the inner sealing surfaces of the tray and lid together while pressure is applied. This can be done with standard heat sealing packaging equipment capable of exceeding the melt point of the olastic film coating. Additionally, the metal foil edge of the lid can be wrapped around the edge of the metal foil tray and crimped if additional mechanical attachment between the lid and tray is needed.
  • the lid and tray may be sealed together using an adhesive, for example, Epoxy Morprine HSC from Morton Chemical or Medical Adhesive Silicone Type A from Dow Corning Corporation.
  • an adhesive for example, Epoxy Morprine HSC from Morton Chemical or Medical Adhesive Silicone Type A from Dow Corning Corporation.
  • the seal must be capable of withstanding exposure to the heat and pressure of multiple steam sterilization cycles without losing any significant amount of sealing strength.
  • the sealing strength must not be so hiqh as to require excessive force when the lid is peeled from the tray during opening of the package.
  • the amount of adhesion or bonding is typically known as peel strength; measurement techniques for determining peel strength are well known to those skilled in the art.
  • a tray and lid of steam resistant plastic is made in the same manner as the metal foil package except that the plastic coatinq applied to the foil would not be required. At least one opening is cut in both the lid and tray components and gas permeable and bacteria impermeable membranes are used to cover the openings. The membrane is bonded under heat and pressure to the inner plastic surface that comprises the perimeter of each opening.
  • FIG. 1 shows lid and tray package components of the present invention. All components are capable of withstanding exposure to steam sterilization at 132°C (270°F) for at least 15 minutes without suffering significant deformation, as previously described. Openings (3) of the required area are cut through the surface of the metal foil lid material (2).
  • the inner surface of the lid and tray material has a plastic coating. The portion of the coating covering the flange (12) will be bonded to the plastic coating covering the inner surface of the lid (1) adjacent to the lid edges when the package is sealed.
  • a steam permeable, bacteria impermeable membrane (4) large enough to cover the opening area is bonded to the plastic- film coating the inner surface of the lid.
  • the tray contains openings (15) of about the same total area as the lid openings (3).
  • a membrane (14) of the same material as the lid membrane (4) covers the tray openings (15).
  • This package can be doubled if desired, that is the first sealed package can be sealed within a second lid and tray of similar design but larger dimensions. When this double package is sealed and sterilized, it allows the inner package to remain sterile while the outer package is exposed to a non-sterile environment. Double packages are well known to those skilled in the art of medical device packaging and are of particular value in the packaging and subsequent sterilization of manufactured medical devices.
  • FIG. 2 A section of a double package is shown in Figure 2.
  • the reference numbers for Figure 2 are described as follows: 20 - Double package
  • the location of the membrane on the tray and lid and the areas of the openings must be determined according to the size and dimensions necessary for a particular package and the surface area and permeability of the material to be sterilized. It is preferred that the membranes on the tray and lid surfaces be located diagonally opposite each other so that steam or EtO gas can travel down and across the volume of. the package. If this preferred situation is not practical, then increased membrane area and/or increased sterilization time must be used. For example, such a package would use an impermeable tray of steam resistant plastic or plastic coated metal foil and would have a lid of the same materials with membrane covered openings at both ends of the lid or dispersed uniformly over the full area of the lid. The membrane area for this configuration would be at least as large and preferably larger than the area used for membrane openings on diagonally opposite surfaces of an otherwise equivalent lid and tray package.
  • a further embodiment of this invention is a steam sterilizable pouch type of packaging.
  • a pouch could be made of the same type of materials previously described for use in a lid and tray package, e.g., plastic such as polyphthalate carbonate or a plastic coated metal foil.
  • a steam permeable, bacteria impermeable membrane would be bonded to the inside perimeter of openings in the pouch material as previously described.
  • One pouch could be sealed and placed within another to provide a sterile inner pouch similar to the double tray and lid package previously described.
  • a pouch type of package is shown in Figures 3 and 4.
  • Figure 3 shows a piece of plastic coated metal foil (50) that will be folded along dotted line (53) to form the pouch.
  • the two opposing edges (54 and 55, representing the areas between the dotted lines and the edge of the foil) are sealed together under heat and pressure by thermally fusing the plastic coating on the foil.
  • the pouch is steam permeable by virtue of the membranes (56 and 57) covering openings (58,59) through the foil on both sides of the pouch.
  • the preferred location of these openinqs is such that they are situated on opposite ends and sides of the pouch as shown by the sealed pouch of Figure 6 in order to optimize the flow of the sterilizing medium, e.g., steam, across the inside volume of the pouch.
  • a 16.8 cm by 31.1 cm lid intended to cover a tray was cut from an aluminum foil having a plastic coating of polyethylene on the inner surface.
  • This composite foil of .10 mm thickness, was purchased from Allusuisse Flexible Packaging, Inc., Shelbyville, KY.
  • a hole of 5.4 cm diameter was cut through the foil; the center of the hole was located 5.0 cm from one side edge and 5.5 cm from one end edge of the foil sheet.
  • This porous PTFE membrane material had a fibril length of 1.0 microns, a polypropylene backing fabric on one surface, and a total thickness of .05 mm.
  • This circular membrane was placed over the hole in the foil to uniformly overlap the foil perimeter of the hole by 6.5 mm, with the backing-covered surface of the PTFE membrane in contact with the inner polyethylene coated surface of the foil.
  • the membrane was heat sealed to the overlapped foil hole perimeter with a platten type heat sealer set at about 210°C (410°F), using a pressure of about 4.9 kg/square cm applied to the sealing area, for a period of about 15 seconds.
  • a preformed, plastic-coated aluminum foil tray having a depth of 5.7 cm, a width of 15.2 cm, a length of 30.2 cm, and having a flange of .8 cm width around the perimeter of the tray in a plane parallel to the bottom of the tray, was purchased from Wil em Wagner GmbH and Company.
  • This tray was of 0.25 mm total thickness, having a polypropylene coating of .05 mm on the inner surface of the .2mm thick aluminum foil.
  • a hole of 5.4 cm diameter was cut through the bottom surface of the tray, centered on the longitudinal center!ine of the bottom and 7.7 cm from one end.
  • a second piece of the same porous PTFE membrane material used for the lid was placed with the backing surface down over the hole and overlapping by 8.9 cm the inner foil perimeter surface of the hole.
  • the membrane was heat sealed to the overlapped surface in the same manner used previously for the lid, except that a longer period of thirty seconds was used because of the greater thickness of the tray material.
  • the completed lid was then heat-sealed to the flange surface of the completed tray using a second platten-type heat sealer set at 210°C (410°F), with a pressure of about 16.9 kg/square cm applied to the flange area for a period of about eight seconds.
  • This seal is accomplished by melting the inner film coatings of the lid and tray together where they are in contact.
  • a sheet of plastic coated foil, having a coating of polyester on its outer surface, polyethylene on its inner surface and a total thickness of .12 mm was cut into a rectangle of 12.7 cm wide by 47 cm long for the purpose of forming a pouch type of package.
  • the plastic coated foil was purchased from Roll Print Packaging Products , Inc., Addison, Illinois as part number RPP 26-1035.
  • Two openings of 5.1 cm diameter were cut through the surface of the foil, the openings being located with centers on the longitudinal centerline of the foil, 6.5 cm and 30.0 cm from one end of the foil. In this manner the two openings were located on opposite sides and opposite ends of the pouch as shown by Figures 3 and 4 after the sheet was folded in half (the fold being across the width of the sheet) to form the pouch.
  • a tray/lid package made according to Example 1 and a pouch made according to Example 2 were sealed around bacterial test strips of bacillus sterothermophilus with populations of 24,000 spores.
  • An additional bacterial test strip of the same type was sealed within a pouch of.
  • Example 2 which was in turn sealed within a tray/lid package of Example 1 to evaluate a double package.
  • Each of the three test packages was processed through a 132°C (270°F), fifteen minute autoclave sterilization cycle at a maximum cycle pressure of 2.4 kg/square cm. No sample showed any deformation after sterilization.
  • test package was opened aseptically and each bacterial test strip was removed and placed into a test tube containing 10 ml of tryptocase soy broth. These were incubated for at least seven days at 30-35°C (86-95°F) and then checked for growth. All three bacterial test strips showed a negative response, demonstrating that the packages had successfully allowed the entry and exit of steam as required for sterilization. No mechanical or aesthetic damage was incurred during the steam sterilization process.
  • Three additional tray/lid packages were made according to Example 1 in order to evaluate the bacteria impermeability of the vented and sealed packages. These trays were steam sterilized for at least 15 minutes at 270°F.
  • Each sterile sealed package was aseptically injected with a bacterial growth medium comprised of 60 ml of tryptocase soy agar.
  • the three trays were placed into a bacteria challenge chamber and the chamber was sealed.
  • the environment within the chamber was maintained at about 23°C _+ 2°.
  • 10 milliliters of a water suspension of Pseudomonas diminuta containing in excess of 10 colony-forming units per milliliter solution was injected in aerosol form into the chamber using a nebulizer.
  • the pressure within the chamber was steadily increased over a period of about 8 minutes to an indicated 10 psi , which was then maintained for a period of at least 10 minutes.
  • the pressure was then gradually reduced and a vacuum of 5 inches Hg was pulled on the chamber, this change occuring over a period of about 4 minutes.
  • the vacuum was gradually reduced and the trays were removed from the chamber.
  • the packages were then incubated for a period of 72 hours at 30-35°C.
  • the lids were then removed from the tray and the agar growth medium was visually inspected for growth of Pseudomonas diminuta. No growth was apparent, indicating that the sealed packages were bacteria impermeable.
  • a pair of scissors was used to cut out a package lid 18.4 cm by 12.9 cm intended to fit a flanged tray having the same outside dimensions.
  • a single hole of 5.5 cm diameter was cut through the package lid at its center.
  • a circular piece of 8.5 cm diameter was cut from the same expanded PTFE membrane material used previously for Example 1. The backing-covered side of the circular membrane was then bonded to the perimeter of the hole in the lid, overlapping the perimeter 1.5 cm.
  • Bonding was accomplished by using a hand-held sealer set at 210°C (410°F) to apply a pressure of 4.9 kg/square centimeter for about 15 seconds.
  • the lid component was then sealed with heat and pressure to the flanges of a thermofor ed transparent Lexan ® polyphthalate carbonate (General Electric) tray of the same outside dimensions as the lid.
  • the tray material was .5 mm thick, and the tray was 3 mm deep and possessed 1.2 cm wide flanges on all four edges.
  • the sealer was set at 210°C (410°F), applying a pressure of 16.9 kg/square cm for 8 seconds.
  • the finished, sealed lid and tray assembly was then sterilized for 15 minutes at 132°C (270°F). There was no apparent deformation of the completed package after exposure to the steam sterilization cycle.
  • a porous expanded PTFE membrane of .1 mm thickness, about 1.0 micron pore size and .85 g/cc density was manufactured to demonstrate the feasibility of bonding porous PTFE membrane material (without a backing) directly to plastic-coated foil sheet materials in order to make the packaging material of the present invention.
  • Three aluminum foil samples were selected, each with different coatings, as follows: 1) polypropylene, with an additional coating of epoxy morprine adhesive; 2) polyethylene; and 3) polypropylene.
  • a hole of 2.5 cm diameter was cut through each foil sample.
  • a circular piece of the . above described porous expanded PTFE membrane was bonded to the perimeter of each hole with a- 1.3 cm overlap. Bonding was accomplished with the use of a hand-held, sealer set at 210°C (410°F), applying a pressure of about 4.9 kg/square cm for about 60 seconds. All membranes appeared to be well bonded to their respective foil sheets.
  • Example 6 thus describes a lid/tray package in which the porous PTFE membrane material constitutes the entire lid.
  • the polypropylene backed side of the membrane material was heat-sealed to the tray flanges with the same tray sealer used to seal the. tray of Example 1.
  • a sheet of aluminum foil was placed between the membrane and the upper heat sealing surface of the tray sealer in order to protect the portion of the membrane that was not being bonded to the tray flange.
  • the tray sealer was operated with the following settings: temperature 210°C, pressure 16.9 kg/square cm on the flange area with a sealing time under heat and pressure of 20 seconds.
  • porous PTFE membrane lid was securely attached to the tray entirely free of wrinkles.
  • a lid could be made of PTFE membrane having porous backing materials attached to both sides of the PTFE membrane to accommodate sealing the membrane to another package component, e.g., a tray flange, and to allow the opposite surface to accept printing or labels to be attached for identification, etc. Additionally, such a membrane material could be made into a complete pouch-type package similar to that described in Example 2, wherein the porous PTFE membrane with backing becomes the complete package.
  • Two tray and lid packages were made from the same materials as used in Example 1.
  • the trays measured 5 cm wide, 7.5 cm long, 3 cm deep, and had a sealing flange of .45 cm wide.
  • a 1.4 cm hole was cut through the center of each lid.
  • a .2 micron porous PTFE membrane with a polypropylene backing was heat-sealed over the hole in one of the aluminum lids as in Example 1 with a .45 cm wide seal area.
  • the second lid had a .45 micron pore size membrane of the same type sealed over the hole.
  • Both lids were sealed to the trays with a silicone adhesive and allowed to cure overnight. The trays were then sterilized using a steam sterilization cycle of 270°F for 15 minutes, and observed for performance.
  • the .45 micron heat-sealed membrane remained securely bonded to its lid through the sterilization cycle, while the .2 micron membrane was forced inward and free from its lid during the same sterilization cycle apparently due to its inability to transfer steam at a rate adequate to relieve the pressure on the heat-sealed area.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Packages (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Laminated Bodies (AREA)

Abstract

Matériau d'empaquetage non rigide, perméable à la vapeur et imperméable aux bactéries. Ledit matériau est composé d'une feuille non rigide, résistante à la vapeur et imperméable aux bactéries ayant au moins une ouverture traversant d'une surface à l'autre et comportant une membrane perméable à la vapeur et imperméable aux bactéries qui couvre ladite ouverture et est fixée sur la surface de la feuille sur le pourtour de l'ouverture. Ledit matériau d'empaquetage est capable de résister aux cycles de stérilisation à la vapeur à 132 °C (270 °C) pendant 15 minutes sans se gondoler ou rétrécir, ce qui compromettrait l'apparence ou l'intégrité de l'emballage ou la nature stérile de son contenu. Ledit matériau d'empaquetage peut également être utile pour d'autres techniques de stérilisation telles que celles utilisant l'oxyde d'éthylène, les radiations et l'ozone. Des emballages complets fabriqués avec ce matériau sont décrits, ainsi que les composants de ces emballages tels que plateaux et couvercles. Des composants d'emballages et les emballages complets fabriqués avec le seul matériau de membrane sont également décrits.
PCT/US1990/007241 1990-01-26 1990-12-07 Materiau d'empaquetage sterilisable a la vapeur et emballages fabriques avec ledit materiau WO1991011374A2 (fr)

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US47116690A 1990-01-26 1990-01-26
US471,166 1990-01-26

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WO1991011374A2 true WO1991011374A2 (fr) 1991-08-08
WO1991011374A3 WO1991011374A3 (fr) 1991-09-19

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547345A1 (fr) * 1991-12-19 1993-06-23 Kimberly-Clark Corporation Plateau de transport pour instruments chirurgicaux
WO1994019180A1 (fr) * 1993-02-23 1994-09-01 W.L. Gore & Associates, Inc. Materiau d'emballage sterilisable
US5590778A (en) * 1995-06-06 1997-01-07 Baxter International Inc. Double-sterile package for medical apparatus and method of making
US5615770A (en) * 1995-08-10 1997-04-01 Smith & Nephew, Inc. Implant package insert delivery system
US5698294A (en) * 1994-10-12 1997-12-16 Kimberly-Clark Worldwide, Inc. Sterilization wrap material
GB2327372A (en) * 1997-07-19 1999-01-27 Gore & Ass Sterilisable vent
US6275718B1 (en) 1999-03-23 2001-08-14 Philip Lempert Method and apparatus for imaging and analysis of ocular tissue
WO2002040065A1 (fr) * 2000-11-20 2002-05-23 Becton Dickinson France Emballage pour produits a steriliser a l'aide d'un fluide sterilisant a haute temperature
WO2007014436A1 (fr) * 2005-08-04 2007-02-08 Saban Ventures Pty Limited Stérilisation de membrane
WO2009025768A1 (fr) * 2007-08-20 2009-02-26 Gore Enterprise Holdings, Inc. Matériau d'emballage pour stérilisation non pelucheux
US7631760B2 (en) 2008-02-07 2009-12-15 Amcor Flexibles Healthcare, Inc. Dual compartment pouch
EP2377598A1 (fr) * 2010-04-16 2011-10-19 Astrium GmbH Procédé de liaison biocompatible d'une membrane ou d'une feuille PTFE multifonctionnelle à l'aide d'un élément en plastique
DE19851239C5 (de) * 1998-11-06 2013-11-07 Aesculap Ag Verwendung einer flächigen Filterschicht
US9050385B2 (en) 2007-02-02 2015-06-09 Saban Ventures Pty Limited Methods of disinfection or sterilization
WO2015166577A1 (fr) * 2014-05-01 2015-11-05 株式会社ホギメディカル Kit d'instrument médical
US9427710B2 (en) 2013-03-15 2016-08-30 Bemis Company, Inc. Radial filtration vent and medical device packaging
BE1024104B1 (nl) * 2016-07-07 2017-11-16 Belintra Nv Wasbare verplaatsbare kast met afvoer
US20220296739A1 (en) * 2021-03-18 2022-09-22 Canon Kabushiki Kaisha Method of sterilizing liquid ejection head, and liquid ejection head assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503497A (en) * 1968-07-25 1970-03-31 Pall Corp Breather container
CA947678A (en) * 1970-01-21 1974-05-21 Medipak Corporation Limited Container for surgical instruments and appliances
CH657825A5 (de) * 1982-12-01 1986-09-30 Sulzer Ag Sterilisierbare doppelverpackung.
US4992322A (en) * 1988-06-23 1991-02-12 General Electric Company Coextruded products with improved weatherability

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547345A1 (fr) * 1991-12-19 1993-06-23 Kimberly-Clark Corporation Plateau de transport pour instruments chirurgicaux
WO1994019180A1 (fr) * 1993-02-23 1994-09-01 W.L. Gore & Associates, Inc. Materiau d'emballage sterilisable
US5698294A (en) * 1994-10-12 1997-12-16 Kimberly-Clark Worldwide, Inc. Sterilization wrap material
US5698481A (en) * 1994-10-12 1997-12-16 Kimberly-Clark Worldwide, Inc. Sterilization wrap material
US5590778A (en) * 1995-06-06 1997-01-07 Baxter International Inc. Double-sterile package for medical apparatus and method of making
US5615770A (en) * 1995-08-10 1997-04-01 Smith & Nephew, Inc. Implant package insert delivery system
GB2327372A (en) * 1997-07-19 1999-01-27 Gore & Ass Sterilisable vent
WO1999003511A3 (fr) * 1997-07-19 1999-05-14 Gore W L & Ass Uk Event sterilisable
DE19851239C5 (de) * 1998-11-06 2013-11-07 Aesculap Ag Verwendung einer flächigen Filterschicht
US6275718B1 (en) 1999-03-23 2001-08-14 Philip Lempert Method and apparatus for imaging and analysis of ocular tissue
WO2002040065A1 (fr) * 2000-11-20 2002-05-23 Becton Dickinson France Emballage pour produits a steriliser a l'aide d'un fluide sterilisant a haute temperature
FR2816925A1 (fr) * 2000-11-20 2002-05-24 Becton Dickinson France Emballage pour produits a steriliser a l'aide d'un fluide sterilisant a haute temperature
US7100768B2 (en) * 2000-11-20 2006-09-05 Becton, Dickinson And Company Package for products to be sterilized with a high-temperature sterilizing fluid
KR100877237B1 (ko) * 2000-11-20 2009-01-07 벡톤 디킨슨 프랑스 고온의 살균용 유체를 이용하여 살균될 제품용 포장 용기
US8658089B2 (en) 2005-08-04 2014-02-25 Saban Ventures Pty Limited Membrane concentrator
US9241491B2 (en) 2005-08-04 2016-01-26 Saban Ventures Pty Limited Aerosol
US9192164B2 (en) 2005-08-04 2015-11-24 Saban Ventures Pty Ltd Membrane sterilization
US8444919B2 (en) 2005-08-04 2013-05-21 Saban Ventures Pty Limited Space disinfection
US9138005B2 (en) 2005-08-04 2015-09-22 Saban Ventures Pty Limited Membrane concentrator
US8591807B2 (en) 2005-08-04 2013-11-26 Saban Ventures Pty Limited Membrane sterilization
US8591808B2 (en) 2005-08-04 2013-11-26 Saban Ventures Pty Limited Aerosol
WO2007014436A1 (fr) * 2005-08-04 2007-02-08 Saban Ventures Pty Limited Stérilisation de membrane
US8974737B2 (en) 2005-08-04 2015-03-10 Saban Ventures Pty Limited Space Disinfection
US9050385B2 (en) 2007-02-02 2015-06-09 Saban Ventures Pty Limited Methods of disinfection or sterilization
WO2009025768A1 (fr) * 2007-08-20 2009-02-26 Gore Enterprise Holdings, Inc. Matériau d'emballage pour stérilisation non pelucheux
US7631760B2 (en) 2008-02-07 2009-12-15 Amcor Flexibles Healthcare, Inc. Dual compartment pouch
EP2377598A1 (fr) * 2010-04-16 2011-10-19 Astrium GmbH Procédé de liaison biocompatible d'une membrane ou d'une feuille PTFE multifonctionnelle à l'aide d'un élément en plastique
US9427710B2 (en) 2013-03-15 2016-08-30 Bemis Company, Inc. Radial filtration vent and medical device packaging
WO2015166577A1 (fr) * 2014-05-01 2015-11-05 株式会社ホギメディカル Kit d'instrument médical
BE1024104B1 (nl) * 2016-07-07 2017-11-16 Belintra Nv Wasbare verplaatsbare kast met afvoer
US20220296739A1 (en) * 2021-03-18 2022-09-22 Canon Kabushiki Kaisha Method of sterilizing liquid ejection head, and liquid ejection head assembly

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